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CVE-2019-5074

Status: ModifiedCritical (9.8)—

An exploitable stack buffer overflow vulnerability exists in the iocheckd service ''I/O-Check'' functionality of WAGO PFC200 Firmware version 03.01.07(13), WAGO PFC200 Firmware version 03.00.39(12) and WAGO PFC100 Firmware version 03.00.39(12). A specially crafted set of packets can cause a stack buffer overflow, resulting in code execution. An attacker can send unauthenticated packets to trigger this vulnerability.

CVSS

Exploitation probability (EPSS)

EPSS (Exploit Prediction Scoring System, FIRST) estimates how likely a vulnerability is to be exploited in the wild within 30 days. It complements CVSS (impact) and CISA KEV (confirmed exploitation).

Affected technologies (2)

Wago — PFC 100 FirmwareWago — PFC 200 Firmware

CWEs

References

Raw JSON (NVD)

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  "id": "CVE-2019-5074",
  "cveTags": [],
  "metrics": {
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          "accessVector": "NETWORK",
          "vectorString": "AV:N/AC:L/Au:N/C:C/I:C/A:C",
          "authentication": "NONE",
          "integrityImpact": "COMPLETE",
          "accessComplexity": "LOW",
          "availabilityImpact": "COMPLETE",
          "confidentialityImpact": "COMPLETE"
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          "integrityImpact": "HIGH",
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          "vendor": "n/a",
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  "published": "2019-12-18T20:15:16.760",
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      "tags": [
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      "source": "talos-cna@cisco.com"
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      "url": "https://talosintelligence.com/vulnerability_reports/TALOS-2019-0863",
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  "vulnStatus": "Modified",
  "weaknesses": [
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      "source": "nvd@nist.gov",
      "description": [
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          "value": "CWE-787"
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      "value": "An exploitable stack buffer overflow vulnerability exists in the iocheckd service ''I/O-Check'' functionality of WAGO PFC200 Firmware version 03.01.07(13), WAGO PFC200 Firmware version 03.00.39(12) and WAGO PFC100 Firmware version 03.00.39(12). A specially crafted set of packets can cause a stack buffer overflow, resulting in code execution. An attacker can send unauthenticated packets to trigger this vulnerability."
    },
    {
      "lang": "es",
      "value": "Se presenta una vulnerabilidad de desbordamiento del búfer de la pila explotable en la funcionalidad ''I/O-Check'' del servicio iocheckd de WAGO PFC200 versión de firmware 03.01.07(13), WAGO PFC200 versión de firmware 03.00.39(12) y WAGO PFC100 versión de firmware 03.00. 39(12). Un conjunto de paquetes especialmente diseñado puede causar un desbordamiento del búfer de la pila, resultando en una ejecución de código. Un atacante puede enviar paquetes no autenticados para activar esta vulnerabilidad."
    }
  ],
  "lastModified": "2026-06-17T02:37:05.283",
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